Hahahah well everyone has their opinions however penis envy is a cube. Cubes are nice but you want "Pan Cyan" (paneleous cyanseus sp?) 1g pans=at LEAST 3g cubes IME.
Pans are the tits try em
Of the cubes, PE is SPECIAL. Far more potent than anything else I've done (in the cube) familty.
But it is a bitch to grow (for me, others have done much better) so I have to balance out the quanitiy produced in the same amount of space / time with a higher producing such as mexi-cub.
If you have access to some Pan Cyans, well, that is another story, much stronger than most cubes, but also, a bitch to grow since they are cold / wood based, which some people have difficulty with.